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Machine for lego-bricks production. What is a Lego Brick? Modern building material, the so-called "Lego-brick", is a simple and ingenious solution in construction. The product as compared to conventional brick has an important improvement. At the turn of the half of the twentieth century, the Danish entrepreneur Ole Kirk invented children's brick cubes of a new shape - for additional details to help themselves contain, and in the case of a building brick - they helped themselves to lay themselves. The Lego bricks have two convex spherical holes on the upper surface, while the lower surface of the product also has two holes with a concave sphere. It is this form that is a characteristic feature of the "Lego" brick. This geometry provides accurate fixation of bricks when building walls. Docking of rows of bricks is carried out with the help of a glue solution. Lego is a brick. Geometrical dimensions of the lego-brick: length - 250 mm; width - 125 mm; height - 65-90 mm; weight - 3,5-4 kg (depends on the components that make up the product). In one cube 500 pcs. brick (single, height 65 mm) or 357 pieces (one and a half, height 90 mm), about 1600 kg of screening and 220 kg of cement are required for manufacturing. The height of the brick (65-90 mm) is regulated by the setting of the lower punch. Composition of a mixture for the production of Lego-bricks. There are several basic waste compositions of the mixture: - cement-clay mixture. Used: clay (85-90%), cement (10-15%) and water. - cement-sand-clay mixture. Sand (35%), clay (55%), cement (10%) and water. Sand (50-60%), clay (30-40%), cement (10%) and water - mixtures based on various screenings. Screenings (90%), cement (10%) and water. It is important, when planning production, to take into account the availability of raw materials. Bricks produced by pressing, require the presence of raw materials with a fine fraction. This should be taken into account to obtain the required strength of the product. So "Lego" brick, obtained from screening, has the highest strength characteristics. Moreover, the smaller the drop-out fraction - thus the necessary strength of the brick is achieved using less cement. And the content in the product of a large amount of sand can reduce strength due to the presence of a large sand fraction in it. The production of "Lego" bricks, it is possible on two types of machines - mechanical (manual method) pressing and pressing performed by means of hydraulics. In this case, the following firing of products in the thermo-furnace is not performed. With this machine, you can make "Lego" brick with your own hands. Both for personal private construction and for sale. Principle of operation The working mixture, prepared for the formation of bricks, is covered in a small bunker of the machine. With the help of the dispenser the mixture enters the molding compartment (working matrix). Then, manually, using a lever or a hydraulic press, the mixture is compressed under high pressure (usually about 2 tons for a hand-held machine and 60-100 tons for hydraulics). As a result, we get ready "Lego-brick". The hydraulic machine has a three-phase electric motor and an oil pump, which creates the necessary pressure in the hydraulic cylinder. Thanks to the mechanized compression action, this machine achieves high pressure and increases the productivity of the process (about twice the mechanical equivalent). The generated pressure ensures the removal of air from the mixture and the adhesion of the mixture at the molecular level. The main parts of the machine. Loading hopper, mixer, molding chamber. Matrix - with its help is given the geometry of the holes of the "Lego" brick, it is placed in the molding chamber. Electric motor. Oil pump. A hydraulic press that works with oil that pumps the pump. Machine bed. We produce a matrix with adjustable brick height from 65 to 90 mm. Bricks have a height of 90 mm produced a greater number of cubic meters per work shift, and thus laying walls is faster. Considering the difference in climatic conditions of our country and the tradition of laying walls in different regions, you can decide on your own how much brick height for you and your customers is more interesting. Description of the workflow. In manual mode, a lever-type mechanism is used. It creates the necessary force in the press sole. With semi-automatic mode, the formation takes place with the aid of a hydropress. In the second case, the productivity of the equipment increases by approximately 2.5-4 times compared with mechanical pressing. Recommendations In the performance of work, it is important to take into account the fact that not a considerable amount of time is spent on the formation of the brick itself (on average 30-40 seconds), but most of the time it takes to prepare the mixture, load it, and also to remove it from the machine and conclude to the pallet the finished product. That is, the speed and skills of ancillary workers are also important in productivity. To work on the machine, only one worker is sufficient, but with an additional 1-2 auxiliary workers